of the devil and has no independent ontological existence. Augustine always emphasized the sovereignty of God over the devil who can only operate within his God-given framework. Augustine wrote that angels sinned under differing circumstances than humans did, resulting in different consequences for their actions. Human sins are the result of circumstances an individual may or may not be responsible for, such as original sin. The person is responsible for their decisions, but not the environment or conditions in which their decisions are made. The angels who became demons had lived in Heaven; their environment was grounded and surrounded by the divine; they should have loved God more than themselves, but they delighted in their own power, and loved themselves more, sinning "spontaneously". Because they sinned "through their own initiative, without being tempted or persuaded by anyone else, they cannot repent and be saved through the intervention of another. Hence they are eternally fixed in their self-love (De lib. arb. 3.10.29–31)". Since the sin of the devil is intrinsic to his nature, Augustine argues that the devil must have turned evil immediately after his creation. Thus the devil's attempt to take God's throne is not an assault on the gates of heaven, but a turn to solipsism in which the devil becomes God in his world. Further, Augustine rejects the idea that envy could have been the first sin (as some early Christians believed, evident from sources like Cave of Treasures in which Satan has fallen because he envies humans and refused to prostrate himself before Adam), since pride ("loving yourself more than others and God") must precede envy ("hatred for the happiness of others"). Such sins are described as removal from God's presence. The devil's sin does not give evil a positive value, since evil is, according to Augustinian theodicy, merely a byproduct of creation. The spirits have all been created in the love of God, but the devil valued himself more, thereby abandoning his position for a lower good. Less clear is Augustine about the reason for the devil's choosing to abandon God's love. In some works, he argued that it is God's grace that gives the angels a deeper understanding of God's nature and the order of the cosmos. Illuminated by God-given grace, they became incapable of feeling any desire for sin. The other angels, however, are not blessed with grace and act sinfully. Anselm of Canterbury